INORGANICA CHIMICA ACTA
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2018
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IF 2.264
Yebin Guan,Ming Xia,Xiaohong Wang,Weicheng Cao,Alessandro Marchetti
Nano-sized NH 2 -MIL-53(Al) particles were conveniently synthesized in aqueous solution at ambient temperature with a widely applicable mixing method, and the morphology and character were examined with a series of techniques. XRD patterns and TEM images showed that the obtained NH 2 -MIL-53(Al) material possessed rod-like shape, which is different from those obtained from N, N-dimethyl formamide (DMF). This nano-sized NH 2 -MIL-53(Al) matrix displayed enhanced efficiency for adsorptive elimination of methyl blue molecules in aqueous solution.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Yong Tang,Jianhao Qiu,Dingliang Dai,Guanglu Xia,Biyao Fang,Yixin Li,Jianfeng Yao
Defect engineering is used in the development of photocatalysts and has received widespread attention for achieving efficient photocatalysis. Here, ZnIn 2 S 4 with rich sulfur vacancies (V S -ZnIn 2 S 4 ) was integrated with MIL-53-NH 2 for photocatalytic H 2 O 2 production from O 2 reduction under visible light. The sulfur vacancy could effectively promote charge separation and O 2 capture, and the heterostructure between ZnIn 2 S 4 and MIL-53-NH 2 further inhibits charge recombination, which promises highly boosted photocatalytic activities. In ambient air and pure water, V S -ZnIn 2 S 4 /MIL-53-NH 2 heterostructures exhibit superior photocatalytic H 2 O 2 production performance (705 μmol·L −1 ) relative to those of monomeric Znln 2 S 4 (78 μmol·L −1 ), V S -Znln 2 S 4 (210 μmol·L −1 ), MIL-53-NH 2 (38 μmol·L −1 ), as well as ZnIn 2 S 4 /MIL-53-NH 2 (395 μmol·L −1 ). Mechanistic studies have confirmed that the main pathway for H 2 O 2 formation on V S -ZnIn 2 S 4 /MIL-53-NH 2 is ⋅O 2 – -triggered O 2 reduction, and sulfur vacancy can adsorb and activate O 2 to facilitate the production of ⋅O 2 – . This study provides new insights into catalyst design and green synthesis of H 2 O 2 .
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2024
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IF 3.9
Bo Zhao,Yao Yao,Kexin Huang,Jiaxin Li,Minjie Chen,Chao Liu,Hongjian Xu,Xinyu Zhao,Ganggang Chang
The selective hydrogenation of furfural (FFA) to furfuryl alcohol (FA) is regarded as attractive transformation to achieve the sustainable synthesis of value-added chemicals from biomass resources. However, the conventional supported catalysts are significantly restricted by their narrow pore size, ununiform dispersion and easy leaching or aggregation of catalytic sites. Herein, we designed hollow UiO-66-NH2 as the support to encapsulate Pd nanoparticles (Pd@H-UiO-66-NH2) to achieve the highly active and selective conversion of FFA to FA. Benefiting from the void-confinement effect and substrate enrichment of hollow structure, as well as the surface wrinkles, the as-prepared catalyst Pd@H-UiO-66-NH2 exhibited 96.8 % conversion of FFA with satisfactory selectivity reaching up to 92.4 % at 80 °C, 0.5 MPa H2 in isopropanol solvent within 6 h. More importantly, as-prepared Pd@H-UiO-66-NH2 catalyst exhibited excellent long-term stability, as well as good universality toward a series of hydrogenation of unsaturated hydrocarbons.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Yi Cheng,Jilin Zhang
Excessive phosphate in wastewater can cause eutrophication of water body, which will worsen the ecological environment and threaten human health and biological life safety. Adsorption of phosphate is the most effective way to remove phosphate, and efficient adsorbent is the key. Amorphous La(OH) 3 has been deemed as a potential phosphate adsorbent on account of high adsorption capacity and environmentally friendly property. However, it also shows some disadvantages such as easy agglomeration, poor water dispersion. In this study, UiO-66-NH 2 was used as carrier to load amorphous lanthanum hydroxide as an adsorbent for phosphate removal. The adsorbent (UiO-66-NH 2 @La(OH) 3 , ULCs) has good water dispersibility and it is easy to be separated and recovered. At the same time, the maximum phosphate adsorption capacity can reach 140.7 mg P/g. The adsorption process accords with pseudo second order kinetic model and Freundlich isotherm model. The thermodynamic results showed that the adsorption process was spontaneous and endothermic. In addition, in the presence of coexisting anions (such as Cl − , SO 4 2− , NO 3 − ), it also exhibited high selectivity and phosphate removal efficiency. Meanwhile, the adsorption capacity keeps at a high level in the range of pH 3–11. By the merit of above-mentioned properties, the prepared material is expected to be an ideal candidate for phosphate removal from contaminated water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Guanglai Mo,Linxi Wang,Jianhong Luo
It is a challenge to achieve efficient photocatalytic activity of pure MOFs. Herein, the defective NH 2 -MIL-125(Ti) with adjustable linker vacancy level was successfully created by thermal treatment. The band gaps of samples decreased and the more Ti-O clusters on the surface of the samples can be achieved as the time of thermal treatment increased from 0 to 500 min, both of which facilitated the photocatalytic activity for the reduction of Cr(VI). Moreover, the ligands from the surface to the inside of the samples were successively decarboxylated, resulting in the declined specific surface area and the increased proportion of mesoporous and the defect level. The moderate defect level in NH 2 -MIL-125(Ti) can be obtained as the time of thermal treatment was 300 min, which facilitated the separation of photogenerated charges, contributing to the highest photocatalytic activity for reduction of Cr(VI), which was 9.2 times than that of the initial MOFs. However, the excessive linker vacancy defect level in NH 2 -MIL-125(Ti) may result in the seriously affected crystal structure and the retarded separation of photogenerated charges.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Xian-En Zhao,Ya-Nan Zuo,Yinghui Xia,Jing Sun,Shuyun Zhu,Guobao Xu
Although fluorescent nanozymes exhibit great potential in sensing fields, few current nanozyme-based sensors are designed to discriminate catechol (CC) from its two isomers. Herein, fluorescent metal-organic framework (MOF)-based nanozyme is utilized for ratiometric and selective detection of CC without the interferences of hydroquinone (HQ) and resorcinol (RC). NH 2 -Cu-MOF plays multiple roles: (1) it exhibits excellent photoluminescence at 435 nm owing to the 2-amino-1,4-benzenedicarboxylic acid ligand; (2) Cu 2+ imparts MOF oxidase activity to trigger the oxidation of o -phenylenediamine (OPD) into luminescent products (oxOPD) with emissive peak at 571 nm, which quenches the intrinsic fluorescence of NH 2 -Cu-MOF (435 nm) through inner filter effect (IFE); (3) Cu 2+ can complex with CC specifically to produce complex containing o -semiquinone, which not only inhibits MOF’s oxidase-like activity but also quenches the fluorescence of MOF. Therefore, the presence of CC induces the decrease of fluorescence at 571 nm followed by the slight recovery of fluorescence at 435 nm. Notably, HQ and RC have negligible influences on the fluorescence of NH 2 -Cu-MOFs/OPD system. Based on these facts, a ratiometric fluorescence platform for CC has been constructed. It exhibits high sensitivity towards CC with LOD of 0.1 μM.
研究领域:
分析化学
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生物传感
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材料科学
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DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2023
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IF 1.9
Jinyan Tan,Na Zhang,Ling Wang,Liduo Chen,Cuiqin Li,Jun Wang
Metal-organic framework MIL-125(Ti)-NH2 was prepared and coordinated with salicylaldehyde and NiCl2·6H2O to create a heterogeneous catalyst for ethylene polymerization. The structure of the products was characterized by a variety of physical methods, such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), inductively coupled plasma mass spectrometry (ICP-MS), and nitrogen adsorption-desorption. The catalytic performance of MIL-125(Ti)-NH2-Sal-Ni was also investigated. The results showed that the reaction temperature, Al/Ni molar ratio, and ethylene pressure influenced on the catalytic activity and product selectivity. Under optimal reaction conditions, the catalytic activity of MIL-125(Ti)-NH2-Sal-Ni for ethylene oligomerization could reach 5.90 × 104 g·(mol Ni·h)−1 using cyclohexane as the solvent and MAO as the co-catalyst; the main products were C4 and C6. In addition, MIL-125(Ti)-NH2-Sal-Ni had good catalytic stability and recycling, which could be reused at least twice without significant loss of activity. Moreover, based on the evaluation of catalytic performance, the catalytic ethylene oligomerization mechanism of MIL-125(Ti)-NH2-Sal-Ni was also deduced.
研究领域:
材料化学
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催化化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yixing Luo,Qifeng Yang,Wendan Nie,Qilu Yao,Zhujun Zhang,Zhang-Hui Lu
Hydrogen (H2), a regenerable and promising energy carrier, acts as an essential role in the construction of a sustainable energy system. Formic acid (HCOOH, FA), a natural biological metabolic products and also accessible through carbon dioxide (CO2) reduction, has a great potential to serve as a prospective H2 supplier for the fuel cell. Herein, ultrafine and electron-rich IrPdAu alloy nanoparticles with a size of 1.4 nm are highly dispersed on amine-modified mesoporous SiO2 (NH2-SBA-15) and used as a highly active and selective catalyst for fast H2 production from FA. The as-synthesized IrPdAu/NH2-SBA-15 possesses superior catalytic activity and 100% H2 selectivity with initial turnover frequency values of 6316 h–1 with the additive of sodium formate (SF) and 4737 h–1 even without SF at 298 K, comparable to the most effective heterogeneous catalysts ever published. The excellent performance of IrPdAu/NH2-SBA-15 was not only ascribed to the combination of the electronic synergistic effect of trimetallic alloys and the strong metal–support interaction effect but also attributed to the amine (−NH2) alkaline groups grafted on SBA-15, which is beneficial to boost the split of the O–H bond of FA.
研究领域:
材料科学
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催化化学
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能源化学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2025
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IF 2.8
Yingxia Guo,Meichen Liu,Jiye Tian,Chunpeng Feng,Qingbin Wang,Xuan Zhao,Lei Yin
As an important chemical reagent, methoxy polyethylene glycol amine (mPEG-NH 2 ) is widely used in biomedical field. Unraveling the pharmacokinetic behavior of mPEG-NH 2 polymers is essential for revealing the toxicity and efficiency of mPEG-NH 2 related drug delivery systems. In this study, a simple analytical assay based on mass spectrometry (MS) was first established and validated for quantification of mPEG 5 -NH 2 in biological matrix. The multiple reaction monitoring (MRM) transitions at m / z 252.2 (precursor ions) → 87.7 (fragment ions) and m / z 371.2 (precursor ions) → 89.2 (fragment ions) were chosen to determine mPEG 5 -NH 2 and OH-PEG 8 -OH, respectively. The UHPLC-MS/MS assay showed excellent linearity over the range of 0.01–10 μg/mL. Intra-day and inter-day accuracies and precisions of the assay were all within ± 6.44 %. The analytical assay was successfully applied to reveal the in vivo pharmacokinetic behavior of mPEG 5 -NH 2 in rats.
研究领域:
药理学
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Guowei Shan,Xiao Xiao,Hong Gao,Qi Zhang,Houyi Peng,Weixing Li
Heavy metal ion (HMI)-contaminated wastewater is a great threat to public health. Membrane separation is an efficient and green technology for HMI removal. Here, the strategy of nanoparticle in-situ growth combined with molecule grafting was proposed to fabricate the UiO-66-NH 2 -g-DTPA/PES composite membrane. The UiO-66-NH 2 nanoparticles bound within the PES membrane substrate uniformly brought a significant number of primary amino groups, providing abundant graft sites for DTPA molecule. Numerous carboxyl groups and tertiary amine groups were introduced as the result of DTPA grafting, enabling the formation of M−DTPA complexes with HMIs. The fabricated UiO-66-NH 2 -g-DTPA/PES membranes exhibited excellent performances. The pure water flux arrived at 6208 L·m −2 ·h −1 and the efficiencies of removing Cu 2+ , Pb 2+ , Cr 3+ and Cd 2+ were 99.73%, 99.79%, 96.91% and 98.33%, respectively. Moreover, the UiO-66-NH 2 -g-DTPA/PES membrane also showed a remarkable stability in pH conditions ranging from 3 to 10 and remained a relatively high performance in the cyclic test.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Qiuzheng Du,Pu Wu,Yiyang Sun,Jingyi Zhang,Hua He
A simple and recyclable imprinted catalytic composite (ZnO@NH 2 -UiO-66, ZUM) was synthesized by postsynthetic modification method with tetracycline (TC) as molecular template. A series of ZUM-n composites with different NH 2 -UiO-66 dopants from 0.1 to 0.7 g had been prepared and compared. The characterization results showed that ZUM-1 possessed the advantages of uniform size, high surface area and wide absorption spectrum. Further research results indicated that ZUM-1 composite has the ability of selective adsorption and the higher photocatalytic degradation efficiency to TC without secondary pollution. Under visible light irradiation, the ZUM-1 could degrade 61.9% of TC within 30 min, which may relate to the inhibition effect of composite materials on electron-hole recombination. The degradation selectivity of ZUM-1 was investigated by comparing the degradation efficiency of TC, tetracycline hydrochloride and ciprofloxacin. The high degradation efficiency and selectivity of ZUM-1 were also confirmed in real samples. The stability experiments showed that the ZUM-1 possessed excellent recyclability and stability in the photocatalytic degradation process, and the recycled process was environmentally friendly. The mechanism of TC photodegradation by ZUM-1 was investigated by UV–vis spectra, photoelectrochemical and radical scavenger experiment. And the possible degradation products were analyzed by HPLC-MS. All in all, this method provided a simple and promising perspective for preparing visible-light-responsive molecular imprinting composites with high specificity and photocatalytic activity.
研究领域:
环境科学
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材料科学
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光催化
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Jun-Qing Ye,Bin Cheng,Yunfei Bu,Jun-Feng Qian,Qian Liang,Ming-Yang He,Qun Chen
The development of high-efficiency photocatalysts for water splitting to hydrogen (H 2 ) is crucial for alleviating energy crisis and environmental problems. In this study, a novel type-II ternary heterojunction photocatalyst, CDs/NH 2 -MIL-125 (Ti)/Cu 2 O, was fabricated through the integration of NH 2 -MIL-125 (Ti) with Cu 2 O and carbon dots (CDs), exhibited excellent photocatalytic H 2 production rate of 12817.1 μmol/g/h with apparent quantum efficiency (AQE) of 17.13 % under visible light irradiation. Characterization revealed a uniform and dense structural integration with a high Brunauer-Emmett-Teller (BET) surface area of 275.9 m 2 g −1 and a suitable energy band gap of 2.18 eV. Furthermore, the heterostructures promoted efficient photo-generated carrier separation and enhanced reduction capabilities . Notably, CDs, serving as cocatalysts or electron acceptors, improved visible light utilization and electron migration, significantly boosting H 2 production. Insights from electron spin resonance (ESR) and density functional theory (DFT) calculations supported the migration mechanisms of electrons. This work presents a significant advance in photocatalytic technology for sustainable energy by designing high-performance CDs-modified heterojunction photocatalysts.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）